# Mental Calculation

Gruffalo doubling problems: a fun interactive powerpoint on doubling that is ideal for a mental oral starter or as a plenary to round off a lesson

*303*

*11*

Maths challenge, answer the number problem and then unlock the padlock with the answer key.

*1.4k*

*44*

52 ten frame subitizing cards.I enlarged mine to A3 and use as flashcards during mat session and activity time.Great tool to help with subitizing and mental calculation skills in maths

*6*

Could make some addition and subtraction signs which could also be turned over like the numbers to make a calculation LH

*29*

*3*

www.worldcrunch.com "Je pense, donc je suis", René Descartes. "I think, therefore I am." https://commons.wikimedia.org/wiki/File:Frans_Hals_-_Portret_van_Ren...

*1*

Naofumi Ogasawara, winner of the 2012 Mental Calculation World Cup - In his home country of Japan, he is an abacus teacher.

*1*

*3*